Allen Search chess

Upgrading sound system... in E46..Bazooka BA1500 Amp-? - sony bazooka sub

Hello,
I have a Sony Explode, 1200 Watts, 4 ohms (300 watts RMS would be approximately 350 W) are among them. I am thinking of an amplifier which is stronger buy for this sub-activity, and I can not be upgraded sub later. I have some money ..
I would like to at least 500 RMS noise of my system to produce.
1) What Bazooka Amplifier (especially BA1500)
2) I'm using a mono amplifier in order?
3) What was the difference in watts RMS amp and sub for the best production, without breaking the system?

I too am a Bazooka BA1500 Amplifier ... for about $ 40 ... I would be glad if you are on the technical specifications of the amplifier http://shopping.yahoo.com/p:Bazooka 20BA1500%%% 20Care 20Amplifier: 1991955191: page = details; _ylt = AgibC7L5RiTwZQkdvw1ZDO6gDSUF; _ylu = X3oDMTA5ZW01N2htBHNlYwNiZ3N canpyg --

and let me know. BTW, I drive an I-46.
Thank you very much.
Take care.